年老力衰

nián lǎo lì shuāi

old and weak (idiom)

年

nián

grain

老

lǎo

prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity

力

lì

power

衰

shuāi

(bound form) to decay; to decline; to wane